Creating AD Trust Relationship

Ports required for trust relationship:

  • 389 (TCP and UDP) – Directory, Replication, User and Computer Authentication, Group Policy, Trusts – LDAP
  • 636 (TCP) – Directory, Replication, User and Computer Authentication, Group Policy, Trusts – LDAP SSL
  • 3268 (TCP) – Directory, Replication, User and Computer Authentication, Group Policy, Trusts – LDAP GC
  • 3269 (TCP) – Directory, Replication, User and Computer Authentication, Group Policy, Trusts – LDAP GC SSL
  • 88 (TCP and UDP) – User and Computer Authentication, Forest Level Trusts – Kerberos
  • 53 (TCP and UDP) – User and Computer Authentication, Name Resolution, Trusts – DNS
  • 445 (TCP and UDP) – Replication, User and Computer Authentication, Group Policy, Trusts – SMB,CIFS,SMB2, DFSN, LSARPC, NbtSS, NetLogonR, SamR, SrvSvc

Reference:

  • https://technet.microsoft.com/en-us/library/dd772723(v=ws.10).aspx
    https://support.microsoft.com/en-us/help/179442/how-to-configure-a-firewall-for-domains-and-trusts

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